Tubular members and threaded connections for casing drilling and method
US6817633B2 · kind B2 · utility
83Cited by
78References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2002 |
| Grant date | Nov 16, 2004 |
| Priority date | — |
| Expiry date | Jan 13, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE21B17/042
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Oil country tubular goods and other types of tubular members are provided with threaded and coupled connections satisfactory for use in drilling and completing wellbores. The threaded and coupled connections are used to join sections of casing with each other to form a casing string which may be used to drill and complete a wellbore. Each tubular member has first and second pin ends with approximately the same thread form and thread profile with different pitch diameters. Standard API couplings may be used with the casing string.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.